Date   
Re: top band ubitx

walt hodges
 

How about some photos of the fan placement and circuit for fan on/off?

--walt

On Fri, Feb 16, 2018 at 7:08 AM, bill richardson <ng1p.bill@...> wrote:
Some more info and pictures for anyone wanting to use the uBitx on 160m. 

I’m having a blast on 160m I did add larger heat sinks and a pair of small fans that I can turn on and off as needed to keep the finals cool if I’m long winded or using digital modes.

Qrp labs makes a great low pass filter kit:

http://shop.qrp-labs.com/LPF


I added a BNC adapter to connect to the LPF to keep it simple. 

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk%2Fitm%2F272067363782

image1.jpegimage2.jpegimage3.jpeg



On Feb 7, 2018, at 7:22 AM, bill richardson <ng1p.bill@...> wrote:

160m doublet feed with 450 ohm line.
On Feb 6, 2018, at 9:23 PM, Vince Vielhaber <vev@...> wrote:

What are you using for an antenna?

Vince.


On 02/06/2018 08:06 PM, bill richardson wrote:
Turned the output down to about 8 Watts and have made 4 contacts on 160 with great reports. Will add a larger heat sink to be safe.
On Feb 6, 2018, at 7:26 PM, bill richardson <ng1p.bill@...> wrote:

I don’t have a spectrum analyzer but I think your right. Without the LPF installed I’m seeing over 20 Watts out on 160m and with it I see 12watts out so a lot of signal outside of the 160m band is happening...
On Feb 6, 2018, at 7:12 PM, John Backo <jabac@...> wrote:

Bill:

I think what you are seeing is the "normal" variation in the
output of the MOSFETS. Some are better than others at RF.

Gordon's suggestion to turn back the drive is probably the right answer.
Alternatively, you could turn down the gate voltage a bit, but that
would probably introduce compression distortion. Or you could increase
the size of the heat-sink and see how it goes. Probably the wisest thing
to do is both turn back the drive a bit and increase the heat-sink.

Some, but not all, IRF510's are capable of 20W or more on 80m.
you might happen to have some good ones. The key lies in the
harmonic generation and the heat-sinking.

Note that what you are seeing MAY be from UHF oscillation included in
the signal. Be very aware of that. Check your output very carefully.

john
AD5YE









--
Michigan VHF Corp.   http://www.nobucks.net/   http://www.CDupe.com/
                        http://www.metalworkingfun.com







Re: W0EB/W2CTX new I2C software V2.01R Release#ubitx

Michael Hagen
 

Yes, TYPO!

TNX Mike


On 2/16/2018 3:12 PM, Glenn wrote:
Mike
Your pdf file says 0602 smd parts. I assume you mean 0603?

vk3pe

-- 
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
(909) 918-0058
PayPal ID  "MotDog@..."
Mike@...

Re: New ideas for the Audio TX/RX pop and PA output stage improvements on ubitx.net

M Garza <mgarza896@...>
 

I am pretty sure that it is a BN43-202.  Now, where did I put them and that 24ga teflon wire....

Thank you for the great info!

Marco - KG5PRT 

On Feb 16, 2018 5:14 PM, "RCBoatGuy via Groups.Io" <ijnfan-HamRadio=yahoo.com@groups.io> wrote:
Also, what kind of wire is recommended on the new transformer?

Thanks,

Carl, K0MWC

Re: uBitX - problem with power draw and failed chip

Michael Aiello
 

Hi Raj,
I received the replacement TDA2822 today, so I removed the bad chip, replacing it with a socket. Socketing a new 2822, I fired up the board and am pleased to report the board is now drawing just a hair under 90ma, and nothing has exploded. I think I am back on track.
I won't be able to finish the wire-up until next week, because I am traveling for the next few days, but I think the rest will go according to plan.
Thanks for the help
73
Mike N2HTT

LDG Z-817

Randy
 

Does anyone know if the LDG Z-817 autotunner will work with the uBITX HF General Coverage Transceiver?


Thank you!

Re: #ubitx - Off Topic a Litte #ubitx

Ken Brown <n4so.ken@...>
 

Jeffrey Peters-

Switching TX and RX 

The Coaxial change over relay or just Coaxial Relay has no problems, it is either in
RX or in TX.

CX-230 SPDT with 3 X BNC RF connectors is one example.  

Ken



Virus-free. www.avg.com

On Fri, Feb 16, 2018 at 2:30 PM, Jeffrey Peters <dek9jp@...> wrote:
Thanks Arvo,

I have the older version 2 unit.  I wonder about isolation from TX RF bleed though or bleed over?  I just want to do my best to protect the uBitx.
I know tube are much more forgiving, in my personal limited experience.

I will have my uBitx in a metal case,so maybe just making an adapter with a dead short at the antenna connection during transmit will be a good solution.

Thank you, Jeff K9JP

On Fri, Feb 16, 2018 at 3:19 PM, Arvo KD9HLC via Groups.Io <arvopl@...> wrote:

I'm planning something similar, using the µB for TX and SDR for RX.  I'm going to try one of these in the box.

http://www.qrpkits.com/ezseries.html#eztrsw




--
Not all of me will die - - - The good I do will live forever.  <><


Re: wrong frequency after software change. #ubitx

Michael Shreeve
 

Interestingly, Ians software doesn't confuse the LSB and USB. It starts out with LSB on 80. It is possible to make it go to USB on any Band. My upload into the former BITX40 raduino was almost perfect with CEC1.01 (Ians). It doesn't sound really good though and I believe its a "bfo adjustment" which is possible with that software. I'll try that tonight. . It won't work with the original ino https://github.com/afarhan/ubitx from Ashhar. Not correctly anyway. 

Re: New Build Project

Eric KE6US
 

I use  big blunt upholstery needles. Just twist one end  of the wire on. Thread it through the toroid, then just let it drop from gravity. It'll weight the end down while you sort out kinks, etc., then pick up the end and drop it though again. Sometimes I'll stand while I'm working if the wire is long. It goes very fast once you get a rhythm going.

Eric KE6US


On 2/16/2018 3:25 PM, tom.af4hl@... wrote:
I'm just starting a new BITX20 3C/3B build.  First impression: working with #32 wire to wind toroids is like working with spider silk.  It's doable, but I'm not sure how :P

---------------------------------

“Beethoven tells you what it's like to be Beethoven and Mozart tells you what it's like to be human. Bach tells you what it's like to be the universe.”
― Douglas Adams


Re: LDG Z-817

 

Pretty sure it will you would just have to figure out a good way to power it or make yourself a custom connector. I currently use a kt100 made for Kenwood radios with my Yaesu 891 I just take power from the radio and press the tune button on the ATU and transmit a 5-watt am carrier you could technically do the same thing with the z817 and use cw

________________________________________
From: BITX20@groups.io <BITX20@groups.io> on behalf of randy@... <randy@...>
Sent: Friday, February 16, 2018 9:01:49 PM
To: BITX20@groups.io
Subject: [BITX20] LDG Z-817

Does anyone know if the LDG Z-817 autotunner will work with the uBITX HF General Coverage Transceiver?


Thank you!



--
David

 N8DAH
Kit-Projects.com ( http://www.kit-projects.com )

Re: New Build Project

VE7WQ
 

A stroke of genius!

Will try it, thank you Eric,


73! George

VE7WQ


Friday, February 16, 2018, you wrote:

EK> wire is long. It goes very fast once you get a rhythm going.

EK> Eric KE6US

tom.af4hl@...

>> doable, but I'm not sure how :P

Re: top band ubitx

bill richardson
 

Nothing fancy on the fans just two I had in the junk box. 2 small 12v fans that measure 25mm sq. Since I have a plastic case I just used a wood drill bit that was 7/8” for the hole. Wired the fans up to a toggle switch. I found  a double sized heatsink on eBay. 


Here are the pics: I set the new heatsink side by side the original. You can also see in the picture I isolated the finals from the new heatsink to be safe.
image1.jpeg

image2.jpegimage3.jpeg

On Feb 16, 2018, at 6:27 PM, walt hodges <walt.r.hodges@...> wrote:

How about some photos of the fan placement and circuit for fan on/off?

--walt

On Fri, Feb 16, 2018 at 7:08 AM, bill richardson <ng1p.bill@...> wrote:
Some more info and pictures for anyone wanting to use the uBitx on 160m. 

I’m having a blast on 160m I did add larger heat sinks and a pair of small fans that I can turn on and off as needed to keep the finals cool if I’m long winded or using digital modes.

Qrp labs makes a great low pass filter kit:

http://shop.qrp-labs.com/LPF


I added a BNC adapter to connect to the LPF to keep it simple. 

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk%2Fitm%2F272067363782

<image1.jpeg><image2.jpeg><image3.jpeg>



On Feb 7, 2018, at 7:22 AM, bill richardson <ng1p.bill@...> wrote:

160m doublet feed with 450 ohm line.
On Feb 6, 2018, at 9:23 PM, Vince Vielhaber <vev@...> wrote:

What are you using for an antenna?

Vince.


On 02/06/2018 08:06 PM, bill richardson wrote:
Turned the output down to about 8 Watts and have made 4 contacts on 160 with great reports. Will add a larger heat sink to be safe.
On Feb 6, 2018, at 7:26 PM, bill richardson <ng1p.bill@...> wrote:

I don’t have a spectrum analyzer but I think your right. Without the LPF installed I’m seeing over 20 Watts out on 160m and with it I see 12watts out so a lot of signal outside of the 160m band is happening...
On Feb 6, 2018, at 7:12 PM, John Backo <jabac@...> wrote:

Bill:

I think what you are seeing is the "normal" variation in the
output of the MOSFETS. Some are better than others at RF.

Gordon's suggestion to turn back the drive is probably the right answer.
Alternatively, you could turn down the gate voltage a bit, but that
would probably introduce compression distortion. Or you could increase
the size of the heat-sink and see how it goes. Probably the wisest thing
to do is both turn back the drive a bit and increase the heat-sink.

Some, but not all, IRF510's are capable of 20W or more on 80m.
you might happen to have some good ones. The key lies in the
harmonic generation and the heat-sinking.

Note that what you are seeing MAY be from UHF oscillation included in
the signal. Be very aware of that. Check your output very carefully.

john
AD5YE









--
Michigan VHF Corp.   http://www.nobucks.net/   http://www.CDupe.com/
                        http://www.metalworkingfun.com







Re: New ideas for the Audio TX/RX pop and PA output stage improvements on ubitx.net

Nick VK4PP
 

Will it matter if you wind the bn43-202 so that all the wires come out one side only? Still a 2:3 ratio. This will make placing it where the original t11 was look and fit rather well I imagine?
73 and thanks for the excellent mod!

Re: Micron? long, logical and hopefully both educational and amusing ...

KC9SGV <kc9sgv@...>
 

Quod erat demonstrandum...
Certe 



On Feb 16, 2018, at 10:46 PM, Dexter N Muir <dexy@...> wrote:

Micron. I presume that's the descriptive name for the Greek symbol like a 'u'? Well, not all the world has multi-language keyboards, and mine is 'standard' EN-US which doesn't play well outside plain ASCII. That's fine for the most part, but then I come across websites (like this forum) that use characters beyond ASCII's 7-bit range. All very descriptive and decorative, but  I'd like to be able to respond in kind and my customary text editor doesn't cut the mustard. So, just for the occasional web input, am I going to have to stoke up LibreOffice Writer, go through the menus/keystrokes to find the character, then copy and paste the result?
I have a simpler way,though it's a bit different in pronunciation. That 'micron' character's name is pronounced in most languages as "myoo" or "mew", (differentiating it from bovine "moo") and written "mu".
So, folks, I propose those of us wedded to our Text Editors start calling the 'ubitx' the "mubitx". After all, it's only one extra character ( and we already use 'ph', an aspirated 'p', to approximate the Greek 'phi' - and other such: NZ's Maori has 'wh', an aspirated 'w', a fatter-cheeked version of 'ph' and similarly definitely not a "f"...) - and pronunciation is only a brief initial 'hum' of "m"... Don't be surprised to find a 'mubitx' or two from time to time...

There was a young Curate of Kew
Kept a cat he found under a pew,
Tried to teach it to speak
alphabetical Greek,
But he never could get it past "mew".

73 all
Dex, ZL2DEX

Re: Micron? long, logical and hopefully both educational and amusing ...

John Backo
 

Just for the record, the greek letter mu is ALT-230 in the ascii
character set...however, most if not all html or text editors will
not accept it as printable. But Notepad++ does.

OK, Dex. Why not?

john
AD5YE

Re: Micron? long, logical and hopefully both educational and amusing ...

VE7WQ
 

Hello Dexter,


Friday, February 16, 2018, you wrote among many words:


DNM> There was a young Curate of Kew

DNM> Kept a cat he found under a pew,

DNM> Tried to teach it to speak

DNM> alphabetical Greek,

DNM> But he never could get it past "mew".

DNM> 73 all

DNM> Dex, ZL2DEX


So, folks, I propose start calling the 'ubitx' the 'mewbitx'. :)


73! George

VE7WQ

Re: New ideas for the Audio TX/RX pop and PA output stage improvements on ubitx.net

Nick VK4PP
 

Like so

Re: New ideas for the Audio TX/RX pop and PA output stage improvements on ubitx.net

William R Maxwell
 

What counts as a turn in one of those binocular types - up one side and down the other toexit at the same end or just up one side, like a toroid?


On 17/02/2018 4:24 PM, Nik VK4PLN wrote:
Like so

Re: Micron? long, logical and hopefully both educational and amusing ...

Jerry Gaffke
 

I'll likely stick with uBitx, the less typing involved the better.
And no, I won't be editing all those uF's in my schematics to µF's
Or mewF's.

Re: New ideas for the Audio TX/RX pop and PA output stage improvements on ubitx.net

John Backo
 

Bill:

One turn is up one hole and back down through the other hole,
Thus it is double what in normal on a toroid, i.e., the wire
goes twice through the ferrite to make one turn.

And a complete turn always puts the two wire ends on the same side.
E.g., you could easily build a center-tapped winding by putting 5 1/2 turns (say),
twisting a loop for a future connection, and continuing for another 5 1/2
turns to complete the winding. Then a transformer could be made with
another winding starting at the other side (say).

These binocular types make excellent transformers.

john
AD5YE

Re: New ideas for the Audio TX/RX pop and PA output stage improvements on ubitx.net

MVS Sarma
 

While implementing 1/2 turn we can bring back the wire to same side, but on the outside of the bicocular. this dcan be clearly seen in the article mixer musings.
 

Regards
MVS Sarma
 

On Sat, Feb 17, 2018 at 11:28 AM, John Backo <jabac@...> wrote:
Bill:

One turn is up one hole and back down through the other hole,
Thus it is double what in normal on a toroid, i.e., the wire
goes twice through the ferrite to make one turn.

And a complete turn always puts the two wire ends on the same side.
E.g., you could easily build a center-tapped winding by putting 5 1/2 turns (say),
twisting a loop for a future connection, and continuing for another  5 1/2
turns to complete the winding. Then a transformer could be made with
another winding starting at the other side (say).

These binocular types make excellent transformers.

john
AD5YE